Systems
Designing an idempotent payment ledger you can actually debug at 3am
9 min readMar 2026
SohagHasan.
›
I build systems that scale — and I've swum in seas most people only photograph. Eight years of fintech, cloud, and DevOps, shipped calmly under pressure.
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01 — About
Calm under pressure.
Curious by default.
I'm a Tech Lead and Solutions Architect based in Kuala Lumpur with eight years shipping fintech, payments, cloud, and full-stack products. Electrical Engineering background, CS dropout, fast learner — the kind who reads the RFC before the blog post.
Off-hours I mentor on ADPList, contribute to the Laravel community, and disappear into open water and hill trails. I'm happiest when a hard system clicks into place — or when there's no land in sight.
8+yrs
shipping production systems
3
countries worked across
4+
certifications earned
50+
mentoring sessions on ADPList
02 — Toolkit
What I work with daily.
sohag@moby ~ ❯ whoami --skills
~/stack › listing capabilities…
DevOps · Cloud · Infra
AWSDockerKubernetesTerraformCloudFrontRDSRedisGitHub ActionsNginx
Backend
PHP / LaravelNode.jsGoPostgreSQLMySQLGraphQLRESTEvent-Driven
Frontend
ReactTypeScriptNext.jsTailwindLivewireAlpine
Programming · Craft
System DesignEvent StormingDDDTDDObservabilityPayments / PCI
03 — Trajectory
Eight years, five companies,
one through-line: ship real things.
Dec 2023 — now
Moby Money Sdn. Bhd.
Petaling Jaya, Malaysia · RemoteTech Lead
Leading engineering on a regional digital-money product. Architecting payment rails, compliance flows, and a resilient cloud backbone.
Sep 2022 — Aug 2023
DèsVu Stays
Luxembourg · RemoteLead Software Developer
Shipped a hospitality booking platform across property, guest, and operator experiences. Laravel + React, with a clean DDD backbone.
Oct 2020 — Jun 2022
Mobile TopUp Limited
Dhaka, Bangladesh · HybridSenior Software Engineer
Built a high-volume top-up and remittance dashboard serving thousands of operator corridors. Owned provisioning, reconciliation, and reporting.
Sep 2019 — Oct 2020
Optima Solution
Dhaka, BangladeshSenior Programmer
E-commerce, SaaS dashboards, and internal tooling for SMB clients. First exposure to production-grade DevOps and CI/CD pipelines.
Oct 2017 — Sep 2019
SendCargo.co.uk
Dhaka, BangladeshDeveloper · Asst. Operations In-Charge
Logistics and shipment tracking. The role that taught me production code is a contract with everyone downstream.
04 — Highlights
Certifications & community.
05 — Writing
notes.sohag.pro
"I write about what I build — and what I've broken."
DevOps
From Docker Compose to multi-region on AWS without losing the weekend
12 min readJan 2026
Craft
The Laravel codebase smells I keep re-learning the hard way
7 min readNov 2025
06 — Contact
Let's build
something good.
Available for freelance, full-time roles, and interesting conversations. I reply within a day — sometimes sooner, sometimes from a boat.